I agree it's been bad for a while, but by following the negative trend, it is also true that it's gotten noticeably worse. Amazon has nearly completed its transformation into AliExpress but with a worse search function.
If the search function was good, Amazon wouldn't be able to make any money by selling search ads. The only buyers for those ads are vendors who want their interchangeable trinkets to show up at the top of the results screen.
If you're suggesting that AliExpress would be an overall better shopping experience (including appreciating the delivered product), then I will switch!
I actually use ebay. You get the exact same cheap chinesium crap you would get from amazon, with more reliable shipping and often it's cheaper, with the option to get nearly directly from the chinese supplier for a tenth the cost if you are willing to wait the month it takes to come by boat.